The invention relates to the technical field of sewage treatment accessory devices, and especially relates to a sewage treatment device for fiber cloth processing. Sewage can be easily and uniformly mixed with a purifying liquid, so the purifying and precipitating effects are improved; a discharging tube is difficulty blocked, so the discharging efficiency is improved; and a large area of solid wastes in the sewage can be preliminarily filtered out, so the purifying efficiency is increased. The device comprises a working box and four supports, and also comprises a purifying box, the bottom end of the purifying box communicates with a connecting tube, the connecting tube is provided with a connecting valve, and an upper sealing ring sleeves the connecting tube; the device also comprises a motor, a transmission shaft, a connecting shaft and stirring vanes, a lower sealing ring sleeves the transmission shaft, the sidewall of the purifying box communicates with and is provided with an observation hole, the observation hole is provided with a transparent baffle plate, and the transparent baffle plate is provided with a scale; and a filtering sheet is arranged at the left side input end of the discharging tube, the device also comprises a handle, a rotating shaft, a driving shaft, a scraping sheet and a side sealing ring; and the device further comprises a filtering plate.